Greater Wellington
Roof Treatment & Moss Removal Wellington
Absolute House Wash · From $190 · 4.9★ on Google · Instant online quote
Wellington roofs collect moss, lichen and mould faster than most regions thanks to persistent moisture, wind-driven rain and coastal salt. Green streaks on north-facing slopes and dark discolouration in roof valleys are signs organic growth is holding moisture against your tiles or iron.
Based in Johnsonville since 2018. We cover Greater Wellington with the same online price.
2000+ jobs across Greater Wellington
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When to book in Wellington
Late summer into autumn is the best window across Greater Wellington — dry enough for biocide, before winter rain.
Our biocide roof treatment is spray-and-leave — not pressure washing. High-pressure blasting strips protective coatings on Colorsteel and concrete tile, and can void manufacturer warranties. We apply a slow-acting, non-chlorine algae-stat that kills moss, mould and lichen at the root over 3–6 months, with full results continuing for up to a year.
We treat concrete tile, long-run iron, Colorsteel and decramastic roofs across Wellington City, Lower Hutt, Porirua and the Kapiti Coast. Reapplication every 18–24 months keeps organic material from regrowing. Pair roof treatment with gutter clearing in one visit — popular across coastal suburbs like Seatoun and Titahi Bay, and the leafy northern hills in Ngaio, Newlands and Johnsonville.
Related guides
- When to Wash Your Roof in Wellington →
Wellington's damp climate makes moss and lichen a year-round problem. Here's when to treat your roof for best results.
- Why Wellington Houses Get Moss and Mould So Fast →
Wind-driven rain, salt and shade — the three reasons cladding greens up here, and what actually removes it.
- Soft Wash vs Pressure Wash: What's Right for Your Home? →
Not all exterior cleaning is equal. Learn why we choose soft washing for Wellington weatherboards and stucco.
Get an instant estimate for your Wellington property with the same pricing as our main site, with optional 5% discount when you pay in full upfront.
“Best house wash in Wellington. Fair pricing, no surprises, and they treated our weatherboards with care.”
Roof treatment results
Biocide spray-and-leave — moss and lichen die back over months without pressure washing damage.
Frequently asked questions
Common questions about roof treatment & moss removal wellington.
Most Wellington roofs start from around $190 for smaller homes up to ~120 m², with larger roofs from ~$260. Properties over 200 m² are priced per square metre. Get an exact figure in under two minutes with our free instant online estimate — no call-out fee.
No. We apply a biocide spray-and-leave treatment that kills moss, lichen and mould at the root over several months. This extends roof life without the coating damage caused by pressure washing concrete or metal tiles.
We treat concrete tile, long-run iron, Colorsteel and decramastic roofs across Greater Wellington. The biocide is safe on factory coatings and won't void Colorsteel warranties the way high-pressure washing can.
The treatment is slow-acting — you'll typically notice moss and lichen dying back within 3–6 months as rain washes away dead organic matter. Full results continue to improve over 12 months.
We recommend reapplication every 18–24 months to prevent regrowth. Wellington's moisture and coastal air mean roofs collect organic growth faster than drier regions.
Yes — this is a popular combination. Clearing gutters first ensures treated runoff drains properly, and booking both together saves a separate visit.
Nearby service areas
Popular suburbs we serve across Wellington and the Hutt Valley.
Price your Wellington job
Same online pricing as the rest of the site. No call-out fee. From $190. Pay in full for 5% off.
Get Your Personalised Price Estimate
Same services and pricing logic as our online estimate calculator: house wash, roof, gutters, spider treatment & more. Pay in full upfront for 5% off.